Medical Dictionary


noun sub·stance \ˈsəb-stən(t)s\

Medical Definition of SUBSTANCE

:  physical material from which something is made or which has discrete existence <the substance of nerve tissue>
:  matter of particular or definite chemical constitution
:  something (as alcohol, methamphetamine, or marijuana) deemed harmful and usually subject to legal restriction <heroin is a controlled substance> <substance abuse>
May 24, 2015
erudite Hear it
learned or pedantic
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